Spotted Nightjar vs Ocellated Poorwill
Eurostopodus argus 比較対象 Nyctiphrynus ocellatus
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Ocellated Poorwill |
|---|---|---|
| 学名 | Eurostopodus argus | Nyctiphrynus ocellatus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 42.7 cm (16.8 in) | 25.1 cm (9.9 in) |
| 体重 | 102.5 g (3.62 oz) | 38.12 g (1.34 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Nocturnal aerial insectivore; hawks moths and small insects over South American forest interior. |
| 一腹卵数 | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Spotted Nightjar
Loud churring 'good-lord-deliver-us' repeated at dusk; melodic bubbling quality; also emits hollow 'cow-cow-cow' series and soft frog-like croaking
Ocellated Poorwill
Soft, repeated 'oo-whirr'; gentle purring whistle from Amazonian forest floor; calls at night from ground perch; quiet and easily overlooked despite continuous calling
Geographic Range & Migration
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
Ocellated Poorwill
Resident of lowland and foothill forest edge, secondary growth, and scrub from Nicaragua south through Panama and northwestern Colombia to Peru.
保全状況
Spotted Nightjar
Ocellated Poorwill
How to Tell Them Apart
Spotted Nightjar
Cryptically mottled grey-brown, rufous, and black with intricate vermiculations; distinctive large white spots on wing coverts; white throat patch; no white in wings or tail. Sexes similar with slight pattern …
Ocellated Poorwill
Brown mottled above with distinctive buff and rufous ocellated spots on wing coverts giving spotted appearance; pale buff below with dark barring; white throat in male; small white tail spots; …
About These Birds
Spotted Nightjar
オーストラリア本土のスピニフェックス草原に生息するヨタカで、体重103g。
Ocellated Poorwill
A small Caprimulgidae poorwill (~38 g) of lowland and foothill rainforest understorey from Nicaragua through the Amazon Basin. Named for pale ocellate spots on the wing coverts visible at rest. Roosts on or near the ground; feeds on insects nocturnally. Secretive and infrequently recorded. Least Concern.